水土保持学报2012，Vol.26Issue(4)：251-255,278,6.
塔里木河上游典型绿洲土壤水盐空间分异特征
Spatial Variability of Soil Water-Salt in a Typical Oasis on the Upper Reaches of the Tarim River
摘要
Abstract
Based on the data collected from 64 sampling sites, spatial variablhty ot soil water-salt m the surface（0--10 cm） and subsurface（10--20 cm） layer of Aler reclamation area of the upper reaches of the Tarim river was analyzed by the methods of traditional statistics and geostatistics. The results showed that spatial heterogeneity of soil moisture, pH, conductivity and total salt were very obviously. The soil salinity and alkalization were generally high. The variation was moderate in soil moisture, weak in pH, and strong in conductivity and total salt. There was a trend of accumulation of salt to the surface. The semivariogram of soil water moisture and values of surface pH was best described by the exponential model while others by the spherical model. The ratio of nugget and still ranged from 0. 122 to 0. 316, which in surface layer was less than that in subsurface. The variables showed strong spatial autocorrelation resulting from effect of structural factors and spatial structures were complex. The spatial distribution of variables was closely related with the regional environment. The values of soil moisture, conductivity and total salt decreased gradually while the values of pH increased along the direction of riverside, oasis to desert. Continuous cropping is a factor that impacts on the spatial distribution and strengthens the spatial heterogeneity of soil water-salt.关键词
土壤水盐/空间变异/绿洲/塔里木河上游Key words
soil water-salt/spatial variability/oasis upper reaches of the Tarim river分类
农业科技引用本文复制引用
贡璐,韩丽,任曼丽,桂东伟孔..塔里木河上游典型绿洲土壤水盐空间分异特征[J].水土保持学报,2012,26(4):251-255,278,6.基金项目
国家重点基础研究发展计划项目（2009CB421302）,国家自然科学基金项目 （）
